Why won't my bubble fluid blow bubbles?

I am having severe problems with bubble fluid, both in a bubble machine and hand held blowers. After a while of usage, the bubbles stop! With the machine, I was making thousands of bubbles.....I left it standing still for an hour (in direct sunlight so not sure if that affected it) and when I turned it on again there was very few bubbles. I have experimented with various different makes of fluid....and the same happens with all of them. I would really appreciate some help on this as I use the bubbles (or try to) as part of my business.

[MOD EDIT - PLEASE TRY TO PHRASE YOUR THREAD TITLES AS QUESTIONS - THIS IS OUR FORUM POLICY AND MAKES IT MUCH EASIER FOR PEOPLE TO FIND WHAT THEY ARE LOOKING FOR AND TO ANSWER YOUR QUESTIONS - thanks - Chris]

You could try making your own solutions. I don't have a recipe to hand but I'm sure you can google it. The best bubbles I have ever seen were at the experimentorium in Denmark. They said their recipe was a secret. Shucks!

Logged

Give a man a fire and he is warm for a day, set a man on fire and he is warm for the rest of his life.